DailySale offers this 18K Gold Interconnected Tri Color Rolling Ring for $9 with free shipping. (Ec-Shop via Amazon sells a similar ring for a buck more.) That's $61 off list and the lowest total price we could find, although we saw it for $1 less last month. It's available in sizes 5 to 9.
Note: The countdown timer on the product page does not reflect an actual expiration time and resets daily.